There is no best imo. It’s what’s appropriate for the situation. Plastic stocks need ( imo ) an inch or so in front of the receiver. It shortens the flimsy stock forearm thereby adding some stiffness to it. Mitigates the barrel from touching the fore end under recoil or while loading a bi pod. ( also when in a sling )
Good stiff stocks don’t require any glass in front of the receiver of a 700 depending on the barrel weight. I don’t think it hurts though to have some glass ahead of the receiver.
